Fast Algorithm to Quickly Find the Range a Number Belongs to in a Set of Ranges?

Question

The Scenario

I have several number ranges. Those ranges are not overlapping - as they are not overlapping, the logical consequence is that no number can be part of

Answer 1

If the total range of numbers is low, and you have enough memory, you could create a huge table with all the numbers.

For example, if you have one million of numbers, you can create a table that references the range object.